O_o the hell?! I am 100% sure it works in ep2, I have no idea what's causing it to explode for you, but it's definitely not related to the vmf.
Are you running the compiled map in ep2?
Are you using the hammer from steam/steamapps/half-life 2/bin/hammer.exe
Are your game files uptodate? Verify the game cache.
Or do you have a trigger hurt somewhere/env_explosion that could damage/kill the scanner?









